<template>
  <!-- 专栏列表组件 -->
  <div class="row">
    <div v-for="column in columnList" :key="column._id" class="col-4 mb-4">
      <div class="card h-100 shadow-sm">
        <div class="card-body text-center">
          <img
            :src="column.avatar && column.avatar.fitUrl"
            :alt="column.title"
            class="rounded-circle border border-light my-3"
          />
          <h5 class="card-title">{{ column.title }}</h5>
          <p class="card-text text-left">{{ column.description }}</p>
          <router-link :to="`/column/${column._id}`" class="btn btn-outline-primary">
            进入专栏
          </router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script lang="ts">
import { defineComponent, PropType, computed } from "vue";
import { ColumnProps } from "../store";
import { addColumnAvatar } from "../helper";

export default defineComponent({
  name: "ColumnList",
  props: {
    list: {
      type: Array as PropType<ColumnProps[]>,
      required: true,
    },
  },
  setup(props) {
    const columnList = computed(() => {
      return props.list.map(column => {
        addColumnAvatar(column, 50, 50);
        return column;
      });
    });
    return {
      columnList,
    };
  },
});
</script>

<style scoped>
.card-body img {
  width: 50px;
  height: 50px;
}
</style>
